diff --git a/CHANGELOG.md b/CHANGELOG.md
index e8afae084..ff56c2a9d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 ## [Unreleased]
 
 ### Added
+- Knowledge graph system (#361, #362, #363, #365) — per-entity KnowledgeGraph component (D-041), StableEntityId + EntityRegistry, KnowledgeEventQueue, decay system, 4-level confidence hierarchy
+- Direct observation knowledge flow (#364) — perception emits DirectObservation/LeftLOS events to knowledge graph, entities entering/leaving LOS tracked
 - Observer visibility query (#112) — replaces unfiltered generate_snapshot with LOS-filtered compute_observer_snapshot combining shadowcasting + vision cone
 - Vision cone system (#111) — forward/peripheral/blind sectors per D-015, Facing component updated on movement
 - Symmetric shadowcasting (#110, #359) — Albert Ford algorithm with rational fraction slopes, benchmarked 1.2-10.5x faster than recursive, symmetry guaranteed (D-035)